Merge pull request #1803 in FS/freeswitch from bugfix/FS-12025-freeswitch-crashes-on-reloadxml-when-spandsp-tone-detection-is-running to master

* commit 'd45e9df8':
  FS-12025: [mod_spandsp] FreeSWITCH crashes on reloadxml when spandsp tone detection is running.